Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The order of size of given cations is $${\mathrm{Li}}^{+}<{\mathrm{Na}}^{+}<{\mathrm{Cs}}^{+}$$ and the order of size of given anions is $${\mathrm{I}}^{-}>{\mathrm{F}}^{-}$$ Thus, when the cation is largest and anion is smallest, the cation to anion size ratio is maximum. Hence, cation to anion size ratio is maximum for CsF.